[19] The county council currently consists of 19 members, down from 25, [20] each elected from single member districts. (en.wikipedia.org)
In contrast, single member districts systemically underrepresent diffuse, politically extreme ideological factions which are minorities almost everywhere which tends to moderate the political system as a whole (something that instant runoff voting also does). (politics.stackexchange.com)
The new system is less proportional than the old system (which allocated half the seats through party lists and had smaller single member districts); thus Orban was able to retain his two - thirds majority despite winning 800,000 fewer votes than in 2010. (blog.politics.ox.ac.uk)